package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.mapper.DishMapper;
import com.itheima.reggie.mapper.SetmealMapper;
import com.itheima.reggie.service.CategoryService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {
    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private SetmealMapper setmealMapper;

    @Autowired
    private CategoryMapper categoryMapper;

    @Override
    public R deleteById(Long id) {
        LambdaQueryWrapper<Dish> dqw = new LambdaQueryWrapper<>();
        dqw.eq(Dish::getCategoryId, id);
        Integer count = dishMapper.selectCount(dqw);
        if (count > 0) {
            return R.error("当前分类下有菜品，不能删除");
        }

        LambdaQueryWrapper<Setmeal> dqs = new LambdaQueryWrapper<>();
        dqs.eq(Setmeal::getCategoryId, id);
        count = setmealMapper.selectCount(dqs);
        if (count > 0) {
            return R.error("当前分类下有套餐，不能删除");
        }

        int i = categoryMapper.deleteById(id);
        return i>0?R.success("删除成功"):R.success("删除失败");
    }
}
